摘要
目的:在计算机上建立包括下颌骨及其完整牙列的颞下颌关节(TMJ)三维正交各向异性有限元模型。方法:采用活体人颅为标本,用CT断层扫描技术、图形数字化等方法在计算机上建模,采用柔索约束、受压间隙元等形式进行边界约束。结果:建立了包括下颌骨的TMJ有限元模型,颞下颌关节区根据同龄人的结构形态和力学参数增加了髁突软骨和关节盘结构,同时采用了柔索约束模拟咀嚼肌肉、韧带的约束,在牙合面用间隙元模拟对颌牙的约束。结论:建立的包括下颌骨及其完整牙列的TMJ三维正交各向异性有限元模型,采用柔索、间隙元为边界条件,将大大提高模型的相似性。
砄bjective:To establish a TMJ model including mandible and the whole teeth by means of three dimensional finite element method.Methods:CT scanned transverse sections of TMJ including mandible were taken in young people,a three dimensional model (3 D FEM) of TMJ was established using computer with cable elements and compressive gap elements.Results:The model of the TMJ including mandible and the whole teeth,whose boundary condition is cable and gap element,was established.The TMJ model comprised condyle,glenoid fossa,articular disk and cartilaginous layer.The articular disk and condylar cartilage was constructed according to their normal shape and elastic modulus.The model consisted of 1 394×2 bricks and 2 014×2 nodes.Conclusion:The established 3 D FEM of TMJ including mandible and the whole teeth will improve the similarity of the model to the real TMJ in vivo .
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2000年第1期17-19,共3页
Journal of Practical Stomatology
基金
国家自然科学基金!资助项目 编号 :3930 0 1 51
关键词
颞下颌关节
下颌骨
生物力学
有限元分析
Temporomandibular joint
Mandible
Biomechanics
Finite element analysis
